Galvanized pipe is a kind of light thin-walled steel pipe with hollow square section， also known as steel cold-formed profile. It is a section steel with square section shape and size， which is made of Q hot-rolled or cold-rolled strip or coil as the base material， cold bending and high-frequency welding. In addition to wall thickness thickening， the corner size and edge flatness of hot rolled extra thick wall galvanized pipe reach or even exceed the level of resistance welding cold formed galvanized pipe.
3Classification by section shape
aSan jositoPassivation treatment operation of alloy pipe
Classification by section shape
QRichmikiThe two ends of the steel produced by the seamless pipe manufacturer shall be cut into right angles， and the burrs on the surface shall be removed，Products Show which is the raw material used by the seamless pipe manufacturer. The embryo prototube embryo needs to be cut by a cutting machine to form an embryo material with a length of about one meter，Santa CruzAlloy pipe GH4145Industry Technology Industry Change which is sent to the furnace for heating through the conveyor belt. The billet is sent to the furnace. After internal heating， the temperature is about degrees， and the fuel used is often ethyne. Temperature control in the furnace is a very key factor.
Gh Carbon: the higher the carbon content， the higher the hardness of steel， but the worse its plasticity and toughness
Oxygen blowing welded pipe: it is used as steel blowing pipe. Generally， small-diameter welded steel pipe is used. There are eight standards from / inch to inch. Made of ， ， ， or q-q steel strip. In order to prevent corrosion，Products Show some are aluminized.
The correct and reasonable use of galvanized pipe can play a better role. The product can be widely used in the market because of its obvious performance advantages. Both strength and toughness are worth our choice. Lets see what the specific uses are and what the acceptance standards are?
aWhat is nitriding of alloy pipe
JThe surface of cold galvanized layer is smooth， dense and uniform. It has good mechanical properties and corrosion resistance. The consumption of hot-dip galvanized coating is between % - %. The galvanizing process is complex but the thickness of single-sided coating， surface coating and double-sided coating is different， which takes hot-rolled steel strip as pipe blank， often warm spiral forming and high-frequency lap welding method. The steel pipe has strong pressure bearing capacity and good plasticity， which is convenient for welding and processing; After various strict and scientific inspections and tests， the diameter of steel pipe is large the transportation efficiency is high， and the investment in laying pipeline can be saved. It is mainly used for laying pipelines for transporting oil， natural gas， etc.
Spiral seam submerged arc welded steel pipe (SY- for pressure fluid transportation is a spiral seam steel pipe used for pressure fluid transportation，Products Show which takes hot-rolled steel strip coil as pipe blank， often warm spiral forming and welded by double-sided submerged arc welding. The steel pipe has strong pressure bearing capacity and good welding . After various strict scientific inspections and tests，Santa CruzAlloy pipe GH4145Industry Technology Industry Change it is safe and reliable to use. The steel pipe has large diameter and high transportation efficiency， and can save the investment in laying pipelines. It is mainly used for transporting oil and natural gas.
The second is the control of welding materials to ensure that the welding materials purchased are from formal channels， with quality assurance certificate and certificate， which meet the process requirements; The recovery of welding rod head shall be strictly controlled to ensure the flow direction and dosage; Welding materials shall be baked in strict accordance with the process， please checkrHigh percentage of metal strength.
R H-section steel is an economic section steel with better mechanical properties than I-section steel. It is named because its section shape is the same as the English letter "H". The flange of hot rolled H-beam is wider than that of I-beam， with large lateral stiffness and strong bending resistance. Under the same specification H-beam is lighter than I-beam.
Stair step plate (stair step plate) is a kind of stair used for platform with steel bar mesh. According to the installation method， it generally has two types: welding fixation and bolt (composition: head and screw). It is directly welded to the keel and does not need the side plate with step plate. It is relatively economical and durable， but it is not easy to disassemble，Reinforcement, galvanized pipe, seamless pipe, welded pipe, alloy pipe, I-beam-Shandong Kaiwen metal material Co., Ltd Thickened side plates are required on both sides of the bolted tread plate， and holes are drilled on the side plates.
eSan josito There is a great demand for welded steel mesh in Chinas market.
bF The zinc layer obtained by electroplating is relatively pure， which corrodes slowly in acid， alkali and other fog， and can effectively maintain the steel matrix;